Bug 492178
| Summary: | virsh capabilities run w/ qemu driver does not show vmx flags in <host> section | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Perry Myers <pmyers> |
| Component: | libvirt | Assignee: | Daniel Veillard <veillard> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 5.4 | CC: | apevec, berrange, dallan, kxiong, llim, ovirt-maint, rjones, virt-maint, xen-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-0.8.2-1.el5 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-01-13 22:51:14 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
From IRC: <danpb> <host> <danpb> <cpu> <danpb> <arch>x86_64</arch> <danpb> <features> <danpb> <vmx/> <danpb> </features> <danpb> </cpu> ... <danpb> oh hang on, i'm using xen here <danpb> bet this is a QMEU driver bug ...but why is <cpu> not HV independent? Seems like a design issue. True, seeing the same thing here. <vmx/> is present on Xen but missing on KVM, with otherwise same stack, can't garantee it will be fixed for 5.4 though it should be relatively simple to fix, Daniel Well there is various pieces of code doing this already but this need to be cleaned up, and I'm afraid the refactoring is too much change for 5.4 at this point. So a priori postponed to a later release. Daniel Upstream libvirt is working on exposing full host CPU flags data. In the meantime we should do a quick fix to expose vmx/svm flags so QEMU driver is on a par with the Xen driver. I don't think we can cover this for 5.5 at this point, retargetting it for 5.6 Daniel Fixed in libvirt-0.8.2-1.el5 Verified on x86-64 kvm Intel and AMD
the steps on AMD
run virsh capabilities
<cpu>
<arch>x86_64</arch>
<model>phenom</model>
<topology sockets='1' cores='4' threads='1'/>
<feature name='wdt'/>
<feature name='skinit'/>
<feature name='osvw'/>
<feature name='3dnowprefetch'/>
<feature name='misalignsse'/>
<feature name='sse4a'/>
<feature name='abm'/>
<feature name='cr8legacy'/>
<feature name='extapic'/>
<feature name='cmp_legacy'/>
<feature name='lahf_lm'/>
<feature name='rdtscp'/>
<feature name='pdpe1gb'/>
<feature name='popcnt'/>
<feature name='cx16'/>
<feature name='ht'/>
<feature name='vme'/>
</cpu>
Look at the file /usr/share/libvirt/cpu_map.xml
the svm is included in phenom model
So the bug is verified
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHEA-2011-0060.html |
Description of problem: virsh capabilities should show presence of vmx flags in <host> section. Running virsh capabilities on a box with kvm and kvm_intel modules loaded results in: <capabilities> <host> <cpu> <arch>x86_64</arch> </cpu> <topology> <cells num='1'> <cell id='0'> <cpus num='2'> <cpu id='0'/> <cpu id='1'/> </cpus> </cell> </cells> </topology> </host> vmx flag presence is not reported. Version-Release number of selected component (if applicable): kvm-83-20.el5ovirt libvirt-0.5.1-3.el5ovirt Also reproduced w/ libvirt-0.6.1-4.el5.x86_64.rpm from: http://veillard.com/libvirt/5.4/x86_64/ How reproducible: Every time Steps to Reproduce: 1. 2. 3. Actual results: vmx flag is not shown Expected results: vmx flag should be present Additional info: